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HS B Tephra (Niitsuma, 1976) Satoguchi, 1995

Abbr.: HS B

Invalid synonym: Oh6

• Type locality: Katsuura, Katsuura city, Chiba prefecture
• Tephra
• Pleistocene

• Lithofacies: Tuff

• Host: Ohara Formation

• Distribution: Katsuura, Katsuura city, Chiba pref.; Kamifuse, Isumi city, Chiba pref.

• Utsunomiya and Ooi (2019) Geology of the Kazusa-Ohara District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
• Tamura et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.23-39 DOI